1. Anomalies of the accommodation, clinically considered.;Duane;Arch Ophthalmol,1916
2. Diagnostic signs of accommodative insufficiency.;Cacho;Optom Vis Sci,2002
3. Vergence Eye Movements: Basic and Clinical Aspects.;Schor,1983
4. Binocular Anomalies: Diagnosis and Vision Therapy, 3rd ed.;Griffin,1995
5. Investigations on the relationship between convergence and accommodation of the eyes.;Maddox;J Anat,1886